HEIDENHAIN TNC 407 (243 020) Technical Manual - Manual (Page 720)

11-6
TNC 407/TNC 415/TNC 425 2 Mounting and electrical installation 01.98
2.3.1 Connection of linear encoders
The LE 425 can process up to five encoders with sinusoidal output signals (7 to 16
µ
A
pp
).
Max. input frequency: 50 kHz
Cable adapter, complete (Max. 60 m)
Coupling (female) 9-pin / D-sub connector (male) 9-pin Id.-Nr. 267 269 ..
or
Connecting cable, with one connector (Max. 60 m)
D-sub connector (male) 9-pin Id.-Nr. 268 371 ..
2.3.2 Connection of rotary encoders for speed control
To measure ballscrew speed, the TNC requires HEIDENHAIN rotary encoders with 1 Vpp output
signals and a 5 V power supply. The signal is interpolated by a factor of 256 in the control. When
selecting the line count, remember that the input frequency must no exceed the limit of 200 kHz at
the LE. The line count should be selected so that the number of grating periods for speed control is
at least 5 times that for position control.
Talk with your drive supplier and HEIDENHAIN about possible mounting configurations.
For various types of motors HEIDENHAIN offers the ERN 281 modular rotary encoder with a special
assembly kit that enables the machine tool builder to install the rotary encoder on the motor. The
mounting procedure is quite simple: the motor housing is extended by the length of the spacer in
the assembly kit, and the lid is then re-fitted.
A straightforward solution with a standard encoder from the ROD series can be applied to modify
the first machine when using a drive type for which no assembly kit is yet available.
Max. input frequency: 200 kHz
Cable adapter, complete (Max. 60 m)
Connector (female) 12-pin / D-sub connector (pin) 15-pin Id.-Nr. 267 268 ..
or
Cable adapter, complete (Max. 60 m)
Coupling (female) 12-pin / D-sub connector (male) 15-pin Id.-Nr. 267 267 ..
or
Connecting cable with one connector (Max. 60 m)
D-sub connector (pin) 15-pin Id.-Nr. 268 372 ..